Irbesartan (versus unexposed)

Study	Type of data	Exposure measurement	Outcome assessment	Adjustment
Colvin, 2010	retrospective cohort (claims database)	The national Pharmaceutical Benefits Scheme, with around 80% of prescriptions dispensed in Australia.	Health administrative data from the Western Australia (WA) Hospital Morbidity Data System, the Midwives’ Notification System, the WA Registry of Births and Deaths and the Birth Defect Registry of WA, enabling pregnancies and pregnancy outcomes to be ascertained.	None.